13 May 2020

• 20:3120:31, 13 May 2020 diff hist −53 m 2004 AMC 12A Problems/Problem 18 This is not a solution.

22 January 2020

• 00:2900:29, 22 January 2020 diff hist −21 m 2012 AMC 10A Problems/Problem 25 Be proper.
• 00:1500:15, 22 January 2020 diff hist +8 m 2013 AMC 10B Problems/Problem 25 small tweaks to make solution more cohesive & understandable

4 May 2019

• 13:4613:46, 4 May 2019 diff hist +15 2019 USAJMO Problems/Problem 4 →See also
• 13:4513:45, 4 May 2019 diff hist −16 m 2019 USAJMO Problems/Problem 4 →Solution

5 March 2019

• 23:1023:10, 5 March 2019 diff hist 0 AMC historical results →AMC 12A

12 February 2019

• 22:2922:29, 12 February 2019 diff hist 0 m 1966 AHSME Answer Key #1 is incorrect, I have verified this and answer page agrees current

24 January 2018

• 23:0823:08, 24 January 2018 diff hist −10 m 2017 AMC 10B Problems/Problem 23 →Solution 2

25 April 2016

• 18:5018:50, 25 April 2016 diff hist −38 m Mock AIME 2 2010 Answer Key →Unformatted Solutions